Improvement in pulverizing-barrels



J. C. SENDERLING. Pulverizing-Barrel.

No 210,471. Pat-ented Dec. 3, 1878.,

Witnesses Inveq/mor @Zfdgg j "fir-#12 %0,

UNITED STATES PATENT OFFICE.

JOHN C. SENDERLING, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT lN PULVERlZING-BARRELS'.

Specification forming part of Letters Patent No. 2}),471, dated December3, 1878; application filed September 2, 1878.

To all whom it may concern:

Be it known that I, JOHN C. SENDERLING, of the city"and county of SanFrancisco, and State of California, have invented an Improvement inCrushing and Pulverizing Barrels; and I do hereby declare the followingto be a full, clear, and exact description thereof, reference being badto the accompanying drawings.

My invention relates to certain improvements in crushing and pulverizingbarrels, or that class of apparatus in which balls, rollers, shoes,hammers, &c., are employed to crush and pulverize rock within a rotatingcylinder or barrel.

- It consists in the employment of a non-rotating, stationary, oradjustable shaft passing through the hollow trunnions of the barrel, andsupporting a roller, shoe, or hammer from its inner end or arm. The saidroller, shoe, or hammer may thus be held at a certain point, and as theore or rock to be crushed is fed into the barrel it passes between theroller, shoe, or hammer and the inner periphery of the cylinder orbarrel. The pulverized ore will escape through perforations or slits inthe dies and, from thence through the inclosingscreens, while anyparticles not crushed sufficiently fine will remain in the cylinder orbarrel.

An adjusting arm and rack may be connected with the shaft, so that the'pulverizer may be set at any point desirable within the barrel.

Beferrin g to the accompanying drawings for a more complete explanationof my invention, Figure 1 is a perspective view of my machine. Fig. 2 isa vertical section. Fig. 3 shows a modification.

In the construction of barrels for crushing and pulverizing roclrit hasbeen usual to employ ballsor rollers, which were free to move Within thebarrel as it rotated. As a consequence the tendency of the balls was togravitate toward the lower part of the barrel and when balls ofdifferent weights were used the heaviest lay the lowest, while thesmaller ones arranged themselves up the side of the barrel according totheir weight. The ore when fed into the barrel is also carried up thesides of the barrel, and as a consequence it is never sub ected to thecontinued action of the heavy balls. In order to remedy this, and makemy crushing apparatus most effective, I mount m'y crushing roller uponanarm which is supported from the center, so that the roller may bemaintained at a point where it will be most effective in crushing theore.

A is the barrel or cylinder, which is mounted by means of trunnions Bupon a suitable framework, C. D are the dies which form the rim orperiphery of the drum or barrel, and they are secured between the sidesA by being suitably fitte-d and held by bolts and nuts E, which draw thesides together. The dies are perforated or made with fine slots, throughwhich the ore will pass when fine enough, and an outer fine screen maybe employed. When this is done any ore which is not crushed fine enoughto pass the outer screen is returned by a side passage to the interiorof the barrel.

The crusher consists, in the present case, of a heavy roller, F, whichis mounted upon journals supported by the arm Gr. This arm is hinged orjointed to the arm II, and the arm H is keyed or otherwise secured tothe shaft I. The shaft I extends through the hollow trunnions B, and issupported in exterior boxes J, as shown. This shaft may be adjusted soas to hold the roller permanently in one place; but I prefer to make itadjustable, and this is done by means of the arm K, secured to one endof the shaft, and a curved rack, L, with a pin, M, or other equivalentdevice, by which the arm K is held at any desired point.

It'will be seen that by means of this device the crushing-roller may beheld at a point where the ore tends to accumulate by the rotation of thebarrel. It can thus be made of any desired weight, and the barrel may becorrespondingly shortened. The ore is thus subjected to theheaviestweight, and the rolling motion upon the interior of the cylinder orbarrel subjects it to the most thorough crushin g action with the leastexpenditure of power. The shaft I passing through the trunnionsinterposes no obstacle to the ore being fed in at this point, and it isperfectly independent of the barrel.

In some cases it may be found desirable to employ a shoe in the place ofthe crushingroller, and this is then supported at the end of the arm Gin place of the roller.

When a hammer is to be employed the interior of the dies will be formedinto a series of angular steps, as shown in Fig. 3, and the rotation ofthe barrel causes the hammer to move up the inclines successively andfall upon the steps, where the ore has accumulated; but I prefer theroller above these methods, as being the most eflicient.

it will be manifest that the arm G, which supports the roller, might bekeyed directly to the shaft 1, and the journals of the roller Fsupported in slots, which would allow the roller to adjust itself toirregularities, and springs might be employed to increase the pressureof the roller; but such modifications are mechanical equivalents, whichwill suggest themselves readily.

The whole apparatus is simple, economical, and effective.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. The crushing-roller I journaled in the arm G, and having frictionalcontact with the barrel, said arm being supported by the independentshaft I, and adjusted by the arm K, with its holding-rack, substantiallyas and for the purpose herein described.

2. The roller F, journaled in the hinged arms G H, which allow theroller to rise and fall and adjust itself to irregularities, said arm orarms being keyed to the independent shaft I, passing through the hollowtrunnions and held at any point, substantially as herein described.

3. The independent shaft I, passing through the trunnions B of therotating cylinder or barrel, and supported upon exterior bearings, so asto be adjustable independent of any movement of the barrel, said shaftsupporting and governing the position of the roller, shoe, or hammer F,substantially as herein described.

In witness whereof I have hereunto set my hand.

J. C. SENDE tLlNG.

WVi tnesses Gno. H. STRONG, FRANK A. BRooKs.

